Solid waste: refers to the solid and muddy waste discharged into the environment by people during development, construction, production and operation, and daily life activities. According to different classification standards: 1. Chemical properties: inorganic, organic 2. Shape: solid, muddy 3. Hazard: general, toxic (dangerous) 4. Source: industrial, mining, municipal waste, agricultural solid waste monitoring Solid waste monitoring It is the process of monitoring and measuring solid waste. Solid waste refers to solid and semi-solid wastes that pollute the environment generated in production, construction, daily life and other activities. Industrial solid waste refers to solid waste generated in production activities such as industry and transportation. Urban domestic waste refers to the solid waste generated in urban daily life or activities that provide services for urban daily life, as well as laws and administrative regulations.